135664437 has 8 divisors (see below), whose sum is σ = 191526336. Its totient is φ = 85122752.

The previous prime is 135664433. The next prime is 135664453. The reversal of 135664437 is 734466531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135664437 - 2² = 135664433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135664395 and 135664404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135664433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1329993 + ... + 1330094.

It is an arithmetic number, because the mean of its divisors is an integer number (23940792).

Almost surely, 2^135664437 is an apocalyptic number.

135664437 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

135664437 is a deficient number, since it is larger than the sum of its proper divisors (55861899).

135664437 is a wasteful number, since it uses less digits than its factorization.

135664437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660107.

The product of its digits is 181440, while the sum is 39.

The square root of 135664437 is about 11647.5077591732. The cubic root of 135664437 is about 513.8330153973.

The spelling of 135664437 in words is "one hundred thirty-five million, six hundred sixty-four thousand, four hundred thirty-seven".